[Nov 08, 2025] Get Up-To-Date Real Exam Questions for RCNI with New Materials
Updated RCNI Certification Exam Sample Questions
NEW QUESTION # 25
Which statement is true about Secure Shell (SSH) functionality in FastIron 08.0.95?
- A. Default login timeout is 30 seconds.
- B. Outbound SSH sessions are not supported.
- C. Server function is disabled by default.
- D. Default SSH authentication type is RSA with 2048-bit modulus.
Answer: C
Explanation:
In RUCKUS FastIron software version 08.0.95, the Secure Shell (SSH) server functionality is disabled by default for security reasons. This means that, out of the box, the device will not accept incoming SSH connections until the SSH server is explicitly enabled by the administrator.
To enable the SSH server on a RUCKUS ICX device, follow these steps:
* Access Global Configuration Mode:
enable
configure terminal
* Enable the SSH Server:
crypto key generate rsa
ip ssh server enable
* The crypto key generate rsa command generates the RSA key pair necessary for SSH encryption.
* The ip ssh server enable command starts the SSH server, allowing the device to accept incoming SSH connections.
* Save the Configuration:
write memory
This ensures that the SSH server remains enabled after a reboot.
It's important to note that while the SSH server is disabled by default, the SSH client functionality is enabled, allowing the device to initiate outbound SSH
NEW QUESTION # 26
What are two features of Open Shortest Path First (OSPF)? (Choose two.)
- A. utilizes distance vector
- B. automatic redistribution of routes
- C. uses exterior gateway protocols
- D. updates routes dynamically
- E. calculates link cost
Answer: D,E
Explanation:
Open Shortest Path First (OSPF) is a widely used interior gateway protocol (IGP) designed for routing within an autonomous system (AS). It is a link-state routing protocol that offers several key features:
Key Features of OSPF:
* Calculates Link Cost:
* OSPF assigns a cost to each link, representing the overhead required to send packets across that link. The cost is typically based on the link's bandwidth; higher bandwidth links have lower costs.
* OSPF uses these costs to calculate the shortest path to each network destination, ensuring efficient routing.
* Updates Routes Dynamically:
* OSPF routers exchange link-state advertisements (LSAs) to share information about network topology changes.
* When a change occurs, such as a link failure, OSPF quickly propagates this information, allowing routers to update their routing tables dynamically and converge on a new optimal topology.
Clarifications on Other Options:
* Option A: Utilizes distance vector
* OSPF is a link-state protocol, not a distance vector protocol. Distance vector protocols, like RIP, use different mechanisms for route calculation.
* Option C: Automatic redistribution of routes
* OSPF does not automatically redistribute routes from other routing protocols. Route redistribution between different protocols requires manual configuration.
* Option E: Uses exterior gateway protocols
* OSPF is an interior gateway protocol (IGP) used within a single autonomous system, not an exterior gateway protocol (EGP) like BGP, which is used between autonomous systems.
References:
* OSPF Design Guide
* Understanding OSPF
NEW QUESTION # 27
What are two differences between Class of Service (CoS) and Differentiated Services Code Point (DSCP)? (Choose two.)
- A. DSCP is simpler and can scale easily as the network grows. CoS becomes more complex as network demand for prioritized data increase.
- B. DSCP operates at Layer 2 in OSI model, whereas CoS operates in Layer 3.
- C. DSCP defines priority levels and CoS manipulates traffic according to these defined priority levels.
- D. CoS defines priority levels and DSCP manipulates traffic according to these defined priority levels.
- E. CoS operates at Layer 2 in OSI model, whereas DSCP operates in Layer 3.
Answer: D,E
NEW QUESTION # 28
The root bridge is connected to another switch over two independent 10Gbe links. Which link will remain in a forwarding state on both sides?
- A. the link with the lowest port number on the non-root switch
- B. the link with the highest port number on the non-root switch
- C. the link with the highest port number on the root switch
- D. the link with the lowest port number on the root switch
Answer: D
NEW QUESTION # 29
For multicast clients to stop receiving traffic using a leave request, which protocol must run on the local subnet?
- A. IGMPv2
- B. PIM Dense
- C. IGMP Snooping
- D. IGMPv1
Answer: D
NEW QUESTION # 30
In a core/edge network topology, which ports should have Root Guard enabled?
- A. management ports at the core
- B. route-only ports facing the WAN
- C. edge ports facing the core
- D. core ports facing the edge
Answer: D
NEW QUESTION # 31
As an IP packet is routed across subnets, which value gets updated at each hop?
- A. destination IP address
- B. subnet mask
- C. source IP address
- D. destination MAC address
Answer: D
Explanation:
In network communications, when an IP packet traverses multiple subnets to reach its destination, certain header information is modified at each hop to facilitate proper routing and delivery.
* Destination MAC Address:
* Role: The Media Access Control (MAC) address is a hardware identifier used at the Data Link layer (Layer 2) of the OSI model.
* Update Process:
* As a packet moves from one router to the next, the destination MAC address is updated to reflect the MAC address of the next-hop device.
* This ensures that the packet is correctly forwarded at the Data Link layer within each local network segment.
* Explanation:
* When a router forwards a packet, it encapsulates the IP packet within a new Ethernet frame.
* The router sets the destination MAC address in this frame to the MAC address of the next- hop router or the final destination device if it is on the same local network.
* This process repeats at each hop, with each router updating the destination MAC address to ensure proper Layer 2 delivery.
* Other Header Fields:
* Destination IP Address:
* Remains unchanged throughout the packet's journey, ensuring end-to-end delivery to the correct device.
* Source IP Address:
* Also remains unchanged, identifying the original sender of the packet.
* Subnet Mask:
* Not a field within the packet header; it is used by routers to determine the network portion of an IP address but is not transmitted with the packet.
References:
* For a detailed understanding of how routers handle packet forwarding and the role of MAC addresses in this process, refer to the RUCKUS ICX Switch Configuration Guide, which provides insights into Layer 2 and Layer 3 forwarding mechanisms.
NEW QUESTION # 32
Which three factors must be considered when ordering a replacement power supply for an ICX7650? (Choose three.)
- A. airflow direction
- B. PoE vs non-PoE
- C. DC vs AC power
- D. 110 vs 220 volt
- E. active vs passive cooling
- F. hotswap vs non-hotswap
Answer: B,C,D
NEW QUESTION # 33
Which three objects can be assigned a Layer 3 address? (Choose three.)
- A. GRE tunnels
- B. Virtual LAN
- C. Virtual Ethernet
- D. Stack Interface
- E. Loopback
- F. VxLAN
Answer: A,D,E
NEW QUESTION # 34
At which prompt can the ping command be executed?
- A. ICX7150-C12 Router#
- B. ICX7150-C12 Router(config-if-e1000-1/1/1)#
- C. ICX7150-C12 Router(config)#
- D. ICX7150-C12 Router(config-if-mgmt-1)#
Answer: A
Explanation:
* Understanding CLI Levels:
* The ping command is used to test connectivity to other devices by sending ICMP echo requests.
* It can only be executed from the privileged EXEC mode, which is indicated by the Router# prompt.
* Why Other Prompts Don't Work:
* A. Router(config-if-mgmt-1)#: This is the interface configuration mode for the management port and does not allow execution of diagnostic commands like ping.
* B. Router(config)#: This is the global configuration mode, which is used to configure the switch but does not support diagnostic commands.
* D. Router(config-if-e1000-1/1/1)#: This is the interface configuration mode for Ethernet 1/1/1, which also does not allow execution of ping.
References:
* RUCKUS ICX CLI Guide: RUCKUS Documentation
NEW QUESTION # 35
Which command assigns an interface to an area?
- A. ip ospf area 0
- B. area 0
- C. ip ospf cost 100
- D. router ospf
Answer: A
Explanation:
In RUCKUS ICX switches, assigning an interface to an OSPF (Open Shortest Path First) area involves configuring the interface with the appropriate OSPF area command. The correct command to assign an interface to a specific OSPF area is:
ip ospf area <area-id>
For example, to assign an interface to area 0, you would enter interface configuration mode for the desired interface and execute:
ip ospf area 0
This command associates the interface with OSPF area 0, enabling OSPF routing on that interface within the specified area.
It's important to note that OSPF areas are logical groupings of networks and routers within an OSPF domain.
Assigning interfaces to the correct OSPF areas is essential for efficient routing and network segmentation.
For comprehensive guidance on OSPF configuration, including assigning interfaces to areas, refer to the RUCKUS FastIron Configuration Guide.
NEW QUESTION # 36
Review the following configuration.
A RADIUS server is connected and working. However, a switch technician has forgotten the RADIUS username/password for the ICX. When RADIUS is not functioning, they expect to be able to plug into the console port and use the local username/password as a backup.
The ICX does not accept the local password.
Why can't the technician log in?
- A. The AAA web-server configuration is missing the radius keyword.
- B. Based on the AAA login command, local should be in front of radius for correct backup operation.
- C. Local username/password is only used for SSH and web access.
- D. Based on the AAA login command, local password will only be used if the RADIUS server is unavailable.
Answer: D
NEW QUESTION # 37
A Core, Aggregation, Edge topology network is running Rapid Spanning Tree Protocol (RSTP). Two switches at the edge are legacy and run 802.1D.
To influence the convergence time of the legacy switches at the edge, where are the timers modified?
- A. on the Aggregation switches connected to the legacy edge switches
- B. the route-only port on the upstream gateway
- C. on the two legacy 802.1D switches at the edge
- D. on the root bridge at the core
Answer: A
Explanation:
* RSTP and Legacy 802.1D Compatibility:
* RSTP (802.1w) can interoperate with legacy switches running STP (802.1D). However, the legacy switches use different timers and convergence mechanisms, which can lead to delays.
* Optimizing Timers for Legacy Edge Switches:
* The edge switches running 802.1D rely on BPDU timing set by the upstream aggregation switches.
* To influence the convergence time, the timers such as hello time, max age, and forward delay must be adjusted on the aggregation switches connected to these legacy edge switches. This ensures better compatibility and faster convergence.
* Why Not Other Options?
* A: The route-only port does not participate in STP.
* B: Timers cannot be modified on legacy switches themselves as they strictly follow 802.1D standards.
* D: The root bridge sets global parameters but does not address edge-specific timer optimization.
References:
* RUCKUS RSTP/802.1D Compatibility Guide: RUCKUS Documentation
NEW QUESTION # 38
What is one advantage of the supportsave command versus the show tech-support command?
- A. Uploads directly to RUCKUS support.
- B. Uses fewer CPU cycles during execution.
- C. Allows the transfer of collected data to TFTP.
- D. Generates automatically after a system crash.
Answer: A
NEW QUESTION # 39
Which discovery protocol is enabled by default on all RUCKUS ICX platforms?
- A. FDP
- B. CDP
- C. JDP
- D. LLDP
Answer: D
NEW QUESTION # 40
Which command can be used to identify Cyclic Redundancy Check (CRC) errors on port Ethernet 1/1/1?
- A. show mac-address ethernet 1/1/1
- B. show port security ethernet 1/1/1
- C. show statistics ethernet 1/1/1
- D. show interfaces brief ethernet 1/1/1
Answer: C
Explanation:
* Locating CRC Errors:
* The show statistics ethernet [port] command provides detailed port statistics, including packet counts, errors, and specifically Cyclic Redundancy Check (CRC) errors.
* Why Other Commands Don't Work:
* B. show interfaces brief ethernet 1/1/1: This provides a summary of interface status but does not include detailed error information like CRC errors.
* C. show mac-address ethernet 1/1/1: This displays MAC address table entries for the specified port, unrelated to error statistics.
* D. show port security ethernet 1/1/1: This shows port security configurations and violations, not errors like CRC.
References:
* ICX Switch Command Reference: RUCKUS Documentation
NEW QUESTION # 41
Which device will become the root in the Spanning Tree election process?
- A. the device with root guard enabled
- B. the device with the highest IP address
- C. the device with the highest bridge priority value
- D. the device with the lowest bridge ID
Answer: D
Explanation:
In the Spanning Tree Protocol (STP), the root bridge is the central reference point for all spanning tree calculations. The election of the root bridge is determined by the bridge ID (BID), which comprises two components:
* Bridge Priority:
* A configurable value ranging from 0 to 65,535, in increments of 4,096. The default priority is typically 32,768.
* MAC Address:
* The unique hardware address of the switch.
Root Bridge Election Process:
* Lowest Bridge ID Selection:
* STP elects the switch with the lowest bridge ID as the root bridge. The bridge ID is determined by combining the bridge priority and the MAC address.
* Priority Comparison:
* Switches first compare the bridge priority values. The switch with the lowest priority value is favored.
* MAC Address Comparison:
* If multiple switches share the same priority value, the switch with the lowest MAC address becomes the root bridge.
Example:
* Switch A:
* Priority: 32,768
* MAC Address: 00:1A:2B:3C:4D:5E
* Switch B:
* Priority: 32,768
* MAC Address: 00:1A:2B:3C:4D:5F
In this scenario, both switches have the same priority. Therefore, STP compares the MAC addresses, and Switch A, with the lower MAC address, is elected as the root bridge.
Key Points:
* Enabling root guard on a device does not influence its election as the root bridge; instead, it prevents designated ports from becoming root ports.
* The device with the lowest bridge ID (combination of priority and MAC address) is elected as the root bridge.
* A lower bridge priority value increases the likelihood of a switch becoming the root bridge.
References:
* Root Bridge Election in Spanning Tree Protocol
* Spanning Tree Protocol - Part 3: Bridge ID, Priority, System ID
Sources
NEW QUESTION # 42
Which command will create VE 2 on an ICX running FastIron 08.0.95?
- A. ICX(config-vlan-2)# enable
- B. ICX(config-vlan-2)# router-interface ve 2
- C. ICX(config-vlan-2)# interface ve 2
- D. ICX(config-vlan-2)# vlan 2 name VE2
Answer: B
Explanation:
In RUCKUS ICX switches, a Virtual Ethernet (VE) interface, also known as a routed interface, is used to route traffic between VLANs. To create a VE interface and associate it with a VLAN, follow these steps:
* Access VLAN Configuration Mode: Enter global configuration mode and then VLAN configuration mode for the desired VLAN. For VLAN 2, the commands are:
* Create and Associate VE Interface: Within VLAN configuration mode, create the VE interface and associate it with the VLAN using the router-interface command:
router-interface ve 2
This command creates VE interface 2 and links it to VLAN 2.
* Configure the VE Interface: Exit VLAN configuration mode and enter interface configuration mode for the newly created VE interface to assign an IP address:
interface ve 2
ip address <IP_address> <subnet_mask>
Replace <IP_address> and <subnet_mask> with the desired IP address and subnet mask for the VE interface.
By following these steps, you create a VE interface that enables routing for the associated VLAN. This configuration is essential for inter-VLAN routing,
NEW QUESTION # 43
What is the maximum number of software images that can be stored simultaneously on an ICX switch?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
NEW QUESTION # 44
Which method is required to install a feature license on an ICX running FastIron 08.0.95?
- A. USB
- B. CLI
- C. TFTP
- D. FTP
Answer: B
Explanation:
To install a feature license on a RUCKUS ICX switch running FastIron 08.0.95, follow these steps using the Command Line Interface (CLI):
* Obtain the License Key:
* Purchase the desired feature license from RUCKUS.
* Receive the license key, typically provided as a string of characters.
* Access the Switch CLI:
* Connect to the switch via console, SSH, or Telnet.
* Enter privileged EXEC mode:
enable
* Enter Global Configuration Mode:
* Access global configuration mode:
configure terminal
* Install the License Key:
* Enter the license key using the following command:
NEW QUESTION # 45
When using zero-touch stacking, which two prerequisites must be in place to ensure all devices join the stack?
(Choose two.)
- A. issue stack disable on intended member devices
- B. configure each unit's management IP, VLANs, and tagging
- C. enable stacking on the active controller
- D. ensure units have clean configurations
- E. enable stacking on all devices
Answer: D,E
Explanation:
Zero-touch stacking simplifies the process of forming a stack by automating the configuration. To ensure all devices join the stack seamlessly, the following prerequisites must be met:
* Enable Stacking on All Devices:
* Access each switch's CLI.
* Enter global configuration mode: configure terminal.
* Enable stacking by executing: stack enable.
* Save the configuration with: write memory.
* Ensure Units Have Clean Configurations:
* It's crucial that switches have default configurations to prevent conflicts during the stacking process.
* To reset a switch to its default settings:
* Enter global configuration mode: configure terminal.
* Execute the command: write erase.
* Reload the switch to apply the default configuration: reload.
* Additional Considerations:
* Ensure all switches are running compatible firmware versions to prevent software mismatches.
* Verify that stacking cables are correctly connected to facilitate proper communication between units.
References:
* For a comprehensive guide on building an ICX stack using zero-touch provisioning, consult the RUCKUS Community Forums.
NEW QUESTION # 46
What is one advantage of the supportsave command versus the show tech-support command?
- A. Uploads directly to RUCKUS support.
- B. Allows the transfer of collected data to TFTP.
- C. Uses fewer CPU cycles during execution.
- D. Generates automatically after a system crash.
Answer: B
Explanation:
* Comparison Between supportsave and show tech-support:
* show tech-support: Generates diagnostic information and displays it on the CLI. It does not directly save or transfer the output.
* supportsave: Gathers similar diagnostic data but also allows the data to be transferred to a remote server, such as via TFTP, for easier analysis.
* Why Other Options Don't Apply:
* A. Uses fewer CPU cycles during execution: Both commands are similar in terms of resource usage.
* C. Uploads directly to RUCKUS support: Data transfer to RUCKUS support requires manual intervention.
* D. Generates automatically after a system crash: Neither command generates data automatically; both require user execution.
References:
* ICX Switch SupportSave Command Guide: RUCKUS Documentation
NEW QUESTION # 47
ICX reserves some VLAN IDs for system functions. How many VLAN IDs are reserved?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION # 48
Which two commands can be used to display the IP address of a device attached to a switch port? (Choose two.)
- A. show interface brief wide
- B. show mac-address all
- C. show lldp neighbor detail
- D. show arp
- E. show interface
Answer: C,D
NEW QUESTION # 49
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RUCKUS RCNI Exam Syllabus Topics:
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